Forcing used in Fig. 2 of Hansen, Fung, Lacis, et al. 1988 year ScenA ScenB ScenC 1958 .0 .0 .0 1959 .0198 .0198 .0198 1960 .0462 .0429 .0429 1961 .0627 .0594 .0594 1962 .0891 .0825 .0825 1963 .1122 .1023 .1023 1964 .1287 .1155 .1155 1965 .1518 .1353 .1353 1966 .1782 .1584 .1584 1967 .2046 .1815 .1815 1968 .231 .2046 .2046 1969 .2706 .2343 .2343 1970 .3102 .2706 .2706 1971 .3531 .3069 .3069 1972 .3894 .3366 .3366 1973 .4488 .3861 .3861 1974 .4983 .429 .429 1975 .528 .4488 .4488 1976 .5709 .4818 .4818 1977 .6138 .5181 .5181 1978 .6666 .5643 .5643 1979 .7095 .6006 .6006 1980 .7623 .6468 .6468 1981 .8118 .6864 .6831 1982 .8547 .7227 .7161 1983 .9042 .7689 .759 1984 .9702 .825 .8118 1985 1.0197 .8712 .8547 1986 1.0725 .9141 .8943 1987 1.1253 .9603 .9339 1988 1.1781 1.0065 .9768 1989 1.2342 1.0527 1.0164 1990 1.2903 1.1022 1.0593 1991 1.3464 1.1451 1.0956 1992 1.4025 1.1913 1.1352 1993 1.4619 1.2375 1.1682 1994 1.5213 1.2837 1.2045 1995 1.5807 1.3299 1.2375 1996 1.6434 1.3761 1.2705 1997 1.7061 1.4256 1.3002 1998 1.7688 1.4718 1.3299 1999 1.8348 1.5213 1.3596 2000 1.8975 1.5675 1.386 2001 1.9635 1.6137 1.3853 2002 2.0295 1.6599 1.3846 2003 2.0955 1.7061 1.3839 2010 2.607 2.046 1.3464 2020 3.465 2.508 1.3398 2030 4.5342 2.904 1.3332 2040 5.808 3.333 1.3266 2050 7.458 3.762 1.32